/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/geo2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:21:03,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:21:03,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:21:03,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:21:03,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:21:03,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:21:03,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:21:03,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:21:03,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:21:03,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:21:03,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:21:03,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:21:03,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:21:03,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:21:03,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:21:03,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:21:03,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:21:03,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:21:03,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:21:03,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:21:03,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:21:03,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:21:03,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:21:03,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:21:03,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:21:03,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:21:03,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:21:03,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:21:03,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:21:03,573 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:21:03,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:21:03,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:21:03,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:21:03,578 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:21:03,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:21:03,579 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:21:03,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:21:03,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:21:03,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:21:03,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:21:03,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:21:03,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:21:03,583 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:21:03,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:21:03,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:21:03,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:21:03,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:21:03,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:21:03,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:21:03,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:21:03,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:21:03,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:21:03,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:21:03,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:21:03,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:21:03,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:03,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:21:03,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:21:03,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:21:03,874 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:21:03,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:21:03,899 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:21:03,901 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:21:03,906 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:21:03,908 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 12:21:03,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a47128a/f9786a9337a144ab90ae5669cba0cb06/FLAGd56274877 [2020-07-20 12:21:04,457 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:21:04,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo2.c [2020-07-20 12:21:04,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a47128a/f9786a9337a144ab90ae5669cba0cb06/FLAGd56274877 [2020-07-20 12:21:04,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a47128a/f9786a9337a144ab90ae5669cba0cb06 [2020-07-20 12:21:04,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:21:04,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:21:04,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:21:04,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:21:04,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:21:04,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:21:04" (1/1) ... [2020-07-20 12:21:04,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb9b4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:04, skipping insertion in model container [2020-07-20 12:21:04,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:21:04" (1/1) ... [2020-07-20 12:21:04,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:21:04,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:21:05,040 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:21:05,044 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:21:05,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:21:05,078 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:21:05,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05 WrapperNode [2020-07-20 12:21:05,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:21:05,079 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:21:05,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:21:05,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:21:05,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... [2020-07-20 12:21:05,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:21:05,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:21:05,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:21:05,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:21:05,196 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:21:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:21:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:21:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:21:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:21:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:21:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:21:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:21:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:21:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:21:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:21:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:21:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:21:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:21:05,466 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:21:05,467 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:21:05,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:21:05 BoogieIcfgContainer [2020-07-20 12:21:05,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:21:05,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:21:05,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:21:05,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:21:05,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:21:04" (1/3) ... [2020-07-20 12:21:05,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cd7507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:21:05, skipping insertion in model container [2020-07-20 12:21:05,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:21:05" (2/3) ... [2020-07-20 12:21:05,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cd7507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:21:05, skipping insertion in model container [2020-07-20 12:21:05,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:21:05" (3/3) ... [2020-07-20 12:21:05,480 INFO L109 eAbstractionObserver]: Analyzing ICFG geo2.c [2020-07-20 12:21:05,491 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:21:05,499 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:21:05,511 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:21:05,534 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:21:05,534 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:21:05,534 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:21:05,534 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:21:05,534 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:21:05,535 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:21:05,535 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:21:05,535 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:21:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 12:21:05,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 12:21:05,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:05,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:05,563 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-07-20 12:21:05,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:05,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192959627] [2020-07-20 12:21:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 12:21:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:21:05,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:21:05,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192959627] [2020-07-20 12:21:05,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:21:05,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 12:21:05,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404962674] [2020-07-20 12:21:05,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 12:21:05,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:05,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 12:21:05,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:21:05,711 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-07-20 12:21:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:21:05,742 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-07-20 12:21:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 12:21:05,744 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-07-20 12:21:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:21:05,755 INFO L225 Difference]: With dead ends: 35 [2020-07-20 12:21:05,755 INFO L226 Difference]: Without dead ends: 15 [2020-07-20 12:21:05,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 12:21:05,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-20 12:21:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-20 12:21:05,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 12:21:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-20 12:21:05,807 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-07-20 12:21:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:21:05,807 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-20 12:21:05,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 12:21:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-20 12:21:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-20 12:21:05,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:05,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:06,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:06,019 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-07-20 12:21:06,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:06,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15181233] [2020-07-20 12:21:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:06,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:21:06,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:21:06,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:21:06,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15181233] [2020-07-20 12:21:06,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:21:06,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:21:06,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086825078] [2020-07-20 12:21:06,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:21:06,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:06,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:21:06,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:21:06,133 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-07-20 12:21:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:21:06,217 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-20 12:21:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:21:06,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-07-20 12:21:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:21:06,220 INFO L225 Difference]: With dead ends: 25 [2020-07-20 12:21:06,220 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 12:21:06,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:21:06,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 12:21:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-20 12:21:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-20 12:21:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-20 12:21:06,231 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2020-07-20 12:21:06,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:21:06,231 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-20 12:21:06,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:21:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-20 12:21:06,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 12:21:06,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:06,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:06,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:06,447 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:06,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:06,448 INFO L82 PathProgramCache]: Analyzing trace with hash 50868238, now seen corresponding path program 1 times [2020-07-20 12:21:06,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:06,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469646416] [2020-07-20 12:21:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 12:21:06,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:21:06,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:21:06,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:21:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:21:12,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469646416] [2020-07-20 12:21:12,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:21:12,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 12:21:12,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693713828] [2020-07-20 12:21:12,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:21:12,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:12,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:21:12,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=38, Unknown=3, NotChecked=0, Total=56 [2020-07-20 12:21:12,888 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2020-07-20 12:21:21,285 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 12:21:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:21:31,486 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-07-20 12:21:31,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 12:21:31,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-07-20 12:21:31,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:21:31,488 INFO L225 Difference]: With dead ends: 32 [2020-07-20 12:21:31,489 INFO L226 Difference]: Without dead ends: 29 [2020-07-20 12:21:31,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=23, Invalid=63, Unknown=4, NotChecked=0, Total=90 [2020-07-20 12:21:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-20 12:21:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-20 12:21:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 12:21:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 12:21:31,498 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 17 [2020-07-20 12:21:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:21:31,499 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 12:21:31,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:21:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 12:21:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 12:21:31,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:21:31,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:21:31,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:31,712 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:21:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:21:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1538749201, now seen corresponding path program 2 times [2020-07-20 12:21:31,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:21:31,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856783235] [2020-07-20 12:21:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:21:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:21:31,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 12:21:31,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:21:38,056 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 12:21:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 12:21:38,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:21:38,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:21:53,399 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:21:54,034 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:21:54,040 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:21:54,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:21:56,099 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-20 12:21:56,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:21:56,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:21:59,522 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-20 12:21:59,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:21:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2020-07-20 12:21:59,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856783235] [2020-07-20 12:21:59,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:21:59,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-07-20 12:21:59,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192129615] [2020-07-20 12:21:59,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 12:21:59,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:21:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 12:21:59,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=119, Unknown=10, NotChecked=46, Total=210 [2020-07-20 12:21:59,559 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 15 states. [2020-07-20 12:22:25,957 WARN L193 SmtUtils]: Spent 16.36 s on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-07-20 12:22:34,807 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 12:22:53,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:22:53,199 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-07-20 12:22:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 12:22:53,200 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-07-20 12:22:53,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:22:53,202 INFO L225 Difference]: With dead ends: 39 [2020-07-20 12:22:53,202 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 12:22:53,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=58, Invalid=209, Unknown=13, NotChecked=62, Total=342 [2020-07-20 12:22:53,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 12:22:53,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-07-20 12:22:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-07-20 12:22:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-07-20 12:22:53,212 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 24 [2020-07-20 12:22:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:22:53,213 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-07-20 12:22:53,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 12:22:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-07-20 12:22:53,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 12:22:53,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:22:53,214 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:22:53,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:22:53,416 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:22:53,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:22:53,416 INFO L82 PathProgramCache]: Analyzing trace with hash -695576914, now seen corresponding path program 3 times [2020-07-20 12:22:53,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:22:53,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550846804] [2020-07-20 12:22:53,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:22:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:22:53,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 12:22:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:22:59,890 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 12:23:09,981 WARN L193 SmtUtils]: Spent 7.95 s on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 12:23:10,755 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-07-20 12:23:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 12:23:10,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:23:10,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:23:33,900 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:23:34,310 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:23:34,313 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:23:34,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:23:36,369 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-20 12:23:36,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:23:36,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:23:40,091 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-20 12:23:41,666 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:23:41,865 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:23:41,868 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:23:41,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:23:43,944 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-20 12:23:43,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-20 12:23:43,960 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 12:23:46,024 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 12:23:52,218 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (forall ((v_main_~z~0_BEFORE_CALL_12 Int) (v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~x~0_BEFORE_CALL_15 Int)) (let ((.cse3 (* v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (let ((.cse2 (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15)) (.cse1 (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) v_main_~x~0_BEFORE_CALL_15)) (.cse0 (+ .cse3 1))) (or (= .cse0 .cse1) (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse2) (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (not (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse3) (+ .cse2 v_main_~z~0_BEFORE_CALL_12))) (= .cse1 .cse0)))))) is different from true [2020-07-20 12:24:02,534 WARN L860 $PredicateComparison]: unable to prove that (or (not (= 0 |c___VERIFIER_assert_#in~cond|)) (= 0 c___VERIFIER_assert_~cond) (forall ((v_main_~z~0_BEFORE_CALL_12 Int) (v_main_~y~0_BEFORE_CALL_15 Int) (v_main_~x~0_BEFORE_CALL_15 Int)) (let ((.cse3 (* v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (let ((.cse2 (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15)) (.cse1 (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) v_main_~x~0_BEFORE_CALL_15)) (.cse0 (+ .cse3 1))) (or (= .cse0 .cse1) (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse2) (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12) (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~x~0_BEFORE_CALL_15))) (not (= (+ (* v_main_~z~0_BEFORE_CALL_12 v_main_~z~0_BEFORE_CALL_12 v_main_~y~0_BEFORE_CALL_15) .cse3) (+ .cse2 v_main_~z~0_BEFORE_CALL_12))) (= .cse1 .cse0)))))) is different from true [2020-07-20 12:24:04,597 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (not (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) .cse1))) (= (+ (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) .cse1) (+ (* c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-20 12:24:04,613 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts [2020-07-20 12:24:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 19 not checked. [2020-07-20 12:24:04,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550846804] [2020-07-20 12:24:04,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:24:04,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2020-07-20 12:24:04,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751075044] [2020-07-20 12:24:04,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 12:24:04,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:24:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 12:24:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=168, Unknown=17, NotChecked=186, Total=420 [2020-07-20 12:24:04,640 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 21 states. [2020-07-20 12:24:11,489 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_main_~x~0 c_main_~z~0))) (let ((.cse0 (= (+ .cse2 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0)))) (and (= c_main_~x~0 (+ c_main_~z~0 1)) .cse0 (let ((.cse1 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse1) (+ .cse2 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not .cse0))) (= c_main_~z~0 c_main_~y~0)))) is different from false [2020-07-20 12:24:13,527 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_main_~x~0 c_main_~z~0))) (and (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ c_main_~z~0 .cse0) (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)))) (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) (= c_main_~x~0 (+ c_main_~z~0 1)) (= (+ .cse1 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0)) (= c_main_~z~0 c_main_~y~0))) is different from false [2020-07-20 12:24:15,567 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~z~0 c_main_~z~0))) (and (= (+ c_main_~z~0 .cse0 1) c_main_~x~0) (let ((.cse1 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse1 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) (= c_main_~y~0 .cse0))) is different from false [2020-07-20 12:24:17,657 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 32 DAG size of output: 7 [2020-07-20 12:24:25,503 WARN L193 SmtUtils]: Spent 7.82 s on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 12:24:36,954 WARN L193 SmtUtils]: Spent 5.07 s on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 12:24:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:24:55,215 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-07-20 12:24:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 12:24:55,258 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-07-20 12:24:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:24:55,259 INFO L225 Difference]: With dead ends: 44 [2020-07-20 12:24:55,260 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 12:24:55,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 77.0s TimeCoverageRelationStatistics Valid=78, Invalid=279, Unknown=21, NotChecked=378, Total=756 [2020-07-20 12:24:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 12:24:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-20 12:24:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 12:24:55,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-07-20 12:24:55,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 31 [2020-07-20 12:24:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:24:55,270 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-07-20 12:24:55,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 12:24:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-07-20 12:24:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-20 12:24:55,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:24:55,272 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:24:55,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:24:55,476 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:24:55,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:24:55,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1264228465, now seen corresponding path program 4 times [2020-07-20 12:24:55,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:24:55,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228282749] [2020-07-20 12:24:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:24:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:24:55,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 31 conjunts are in the unsatisfiable core [2020-07-20 12:24:55,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:25:09,045 WARN L193 SmtUtils]: Spent 8.23 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:25:14,694 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 12:25:14,701 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:25:46,941 WARN L193 SmtUtils]: Spent 14.22 s on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 12:25:46,944 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:25:55,078 WARN L838 $PredicateComparison]: unable to prove that (or (and (exists ((v_main_~z~0_BEFORE_CALL_17 Int) (v_main_~x~0_28 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28)) (.cse1 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28))) (and (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 .cse1)) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_28) (+ .cse0 1)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) .cse1) (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28) (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17))))))) (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) is different from false [2020-07-20 12:25:57,122 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 12:26:05,260 WARN L838 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_17 Int) (v_main_~x~0_28 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28)) (.cse1 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28))) (and (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 .cse1)) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_28) (+ .cse0 1)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) .cse1) (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28) (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17))))))) is different from false [2020-07-20 12:26:07,310 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~z~0_BEFORE_CALL_17 Int) (v_main_~x~0_28 Int)) (let ((.cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28)) (.cse1 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28))) (and (= (+ .cse0 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 .cse1)) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_28) (+ .cse0 1)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) .cse1) (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28) (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17))))))) is different from true [2020-07-20 12:26:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 2 not checked. [2020-07-20 12:26:07,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:26:11,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:26:20,429 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 12:26:36,963 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-20 12:26:38,203 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:26:38,273 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:26:38,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:26:40,383 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0))) (or (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) c_main_~x~0))))) is different from true [2020-07-20 12:26:40,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:26:40,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 12:26:49,467 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 c_main_~z~0 c_main_~z~0))) (or (not (= (+ (* c_main_~x~0 c_main_~z~0) (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse0))) (= (+ (* c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))))) is different from true [2020-07-20 12:26:52,531 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:26:53,026 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 12:26:53,029 INFO L320 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-07-20 12:26:53,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:26:55,119 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~x~0 Int)) (let ((.cse1 (* main_~x~0 c_main_~z~0 c_main_~z~0)) (.cse0 (* main_~x~0 c_main_~z~0))) (or (not (= (+ .cse0 (* c_main_~y~0 c_main_~z~0 c_main_~z~0)) (+ c_main_~z~0 .cse1))) (= (+ (* c_main_~z~0 c_main_~z~0) (* main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) (+ .cse1 (* c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0))) (not (= (+ .cse0 1) (+ (* c_main_~y~0 c_main_~z~0) main_~x~0)))))) is different from true [2020-07-20 12:26:55,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228282749] [2020-07-20 12:26:55,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 12:26:55,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 12:26:55,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437325466] [2020-07-20 12:26:55,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 12:26:55,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:26:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 12:26:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=219, Unknown=23, NotChecked=170, Total=462 [2020-07-20 12:26:55,130 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 14 states. [2020-07-20 12:27:28,740 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (exists ((v_main_~z~0_BEFORE_CALL_17 Int) (v_main_~x~0_28 Int)) (let ((.cse1 (* v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28)) (.cse2 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28))) (and (= (+ .cse1 (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17)) (+ v_main_~z~0_BEFORE_CALL_17 .cse2)) (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) v_main_~x~0_28) (+ .cse1 1)) (not (= (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17) .cse2) (+ (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17 v_main_~x~0_28) (* v_main_~z~0_BEFORE_CALL_17 v_main_~z~0_BEFORE_CALL_17))))))))) (and (or (and .cse0 (<= 0 c___VERIFIER_assert_~cond)) (<= 1 c___VERIFIER_assert_~cond)) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (and .cse0 (<= 0 |c___VERIFIER_assert_#in~cond|))) (= |c___VERIFIER_assert_#in~cond| c___VERIFIER_assert_~cond))) is different from false [2020-07-20 12:27:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:27:37,591 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-07-20 12:27:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 12:27:37,627 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-07-20 12:27:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:27:37,628 INFO L225 Difference]: With dead ends: 51 [2020-07-20 12:27:37,628 INFO L226 Difference]: Without dead ends: 49 [2020-07-20 12:27:37,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 98.6s TimeCoverageRelationStatistics Valid=57, Invalid=248, Unknown=25, NotChecked=222, Total=552 [2020-07-20 12:27:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-20 12:27:37,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-07-20 12:27:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 12:27:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-07-20 12:27:37,638 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 38 [2020-07-20 12:27:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:27:37,638 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-07-20 12:27:37,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 12:27:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-07-20 12:27:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-20 12:27:37,640 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:27:37,640 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:27:37,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:27:37,847 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:27:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:27:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 427058510, now seen corresponding path program 5 times [2020-07-20 12:27:37,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:27:37,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117815870] [2020-07-20 12:27:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in